Ram Scientific Safe-T-Fill Capillary Blood Collection Tubes

For labs and phlebotomists working with pediatric, geriatric, or difficult-draw patients, Ram Scientific is best known for its Safe-T-Fill line of capillary blood collection tubes — a system built to make microvolume collection cleaner and more reliable when a full venipuncture isn't practical. Every tube in this collection uses the same 200 µL or 125 µL microcollection format with an attached cap, so samples stay contained from fingerstick or heelstick straight through to processing.

The color coding follows the standard you already know at the bench, which makes matching a tube to an assay straightforward:

• Purple (K2 EDTA) — whole blood for hematology and CBCs. The Safe-T-Fill 200 µL Purple (077051) and the smaller 125 µL EDTA-coated version (076011) both feature a pierceable cap for closed-tube sampling.
• Red (clot activator / separator gel, kaolin coated) — serum tubes rated to 4,000xG. Choose the clear 077120 for routine chemistry or the amber 077421 when a specimen is light-sensitive, such as bilirubin.
• Green (lithium heparin) — plasma tubes like the 200 µL 077250 and 125 µL 076101 for stat chemistries where you can't wait on clotting.

A few things buyers regularly ask: these are non-sterile plastic tubes intended for diagnostic capillary collection, not sterile draws. The attached-cap design reduces the spatter and cross-contamination risk that comes with loose caps, and the pierceable-cap options let analyzers sample without uncapping. Because fill volumes are small (125–200 µL), confirm your instrument's minimum sample requirement before standardizing on a size.

Ram Scientific sits among the diagnostic lab brands we carry alongside Azer Scientific, Aegis Scientific, and Alcor Scientific — worth comparing if you're sourcing collection consumables across a full lab workflow.